Problems from 2021 ICPC North America Regional Programming Contests (March 5 2022)

Name Fastest Total Acc. Ratio Difficulty
Archery Accuracy 0.01 43 13 30% 4.9medium
Average Character 0.00 879 453 52% 1.6easy
Black and White 0.13 147 82 56% 6hard
Circle Bounce 0.00 103 54 52% 4.8medium
Diagonals 0.03 106 40 38% 7.7hard
Dorm Room Divide 0.03 704 99 14% 7.4hard
Double Password 0.00 1115 753 68% 1.4easy
Fail Them All! 0.00 314 79 25% 6.7hard
Hopscotch 500 0.11 306 81 26% 7.1hard
Overdraft 0.00 733 418 57% 1.7easy
Problem Set Construction 0.01 28 18 64% 3.8medium
Reversibly Cyclic Strings 0.00 66 40 61% 4.1medium
Rise and Fall 0.00 380 99 26% 4.1medium
Scaling Recipe 0.00 514 286 56% 1.6easy
Shortest Missing Subsequences 0.13 181 68 38% 5.8hard
Square Bounce 0.00 45 18 40% 6.1hard
Tetris Generation 0.00 728 162 22% 5.9hard
Tournament Seeding 0.03 216 106 49% 3.7medium
Tree Hopping 0.02 432 130 30% 6.9hard
Who Goes There? 0.00 599 174 29% 4.2medium
XOR Island 0.00 120 37 31% 6.7hard